1. Scope

1.1 Low energy components in the photon energy spectrum of Co-60 irradiators lead to absorbed dose enhancement effects in the radiation-hardness testing of silicon electronic devices. These low energy components may lead to errors in determining the absorbed dose in a specific device under test. This method covers procedures for the use of a specialized ionization chamber to determine a figure of merit for the relative importance of such effects. It also gives the design and instructions for assembling this chamber.

1.2 This method is applicable to measurements in Co-60 radiation fields where the range of exposure rates is 7 X 10 -6 to 3 X 10 -2 C kg -1 s -1 (approximately 100 R/h to 100 R/s). For guidance in applying this method to radiation fields where the exposure rate is >100 R/s, see Appendix X1.

1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

E170 Terminology Relating to Radiation Measurements and Dosimetry

E668 Practice for Application of Thermoluminescence-Dosimetry (TLD) Systems for Determining Absorbed Dose in Radiation-Hardness Testing of Electronic Devices

E1249 Practice for Minimizing Dosimetry Errors in Radiation Hardness Testing of Silicon Electronic Devices Using Co-60 Sources

Keywords

absorbed dose; Co-60 irradiators; dose enhancement; ionization chamber; radiation hardness testing; Absorbed radiation dose; Cobalt-60 radiography; Dose enhancement; Electrical conductors (semiconductors); Electronic hardness; Electronic materials/applications; Gamma radiation--electronic components/devices; Ionizing radiation; Irradiance/irradiation--nuclear applications; Low-energy radiation; Photon energy spectrum; Radiation exposure--nuclear materials/applications; Radiation-hardness testing; Silicon semiconductors; Thermoluminescent dosimeter (TLD) ;

ICS Code

ICS Number Code 31.020 (Electronic components in general)

DOI: 10.1520/E1250-88R00

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